The following highways are numbered 16A:
EO16a road, a branch of the EO16 from Agios Prodromos to Polygyros 
U.S. Route 16A 
County Road 16A (Clay County, Florida) 
Nebraska Spur 16A 
New Hampshire Route 16A 
New York State Route 16A (former)
Secondary State Highway 16A (Washington) 
New Hampshire Route 16 is a 154.771-mile (249.080 km), north–south state highway in New Hampshire, United States, the main road connecting the Seacoast region to the Lakes Region and the White Mountains. Much of its length is close to the border with Maine. The section from Portsmouth to Milton is a controlled-access toll highway known as the Spaulding Turnpike. Between Milton and Chocorua, and between Conway and Glen, it is known as the White Mountain Highway. It is known as Chocorua Mountain Highway between Chocorua and Conway and various other local names before crossing into Maine about 20 miles (32 km) south of the Canadian border. Portions of NH 16 run concurrent with U.S. Route 4 (US 4), US 202, NH 25, and US 302, and US 2.
